LONGICORNTIA. 409 
1. Dectes (Leconte, Horn). Elytra densely clothed with erect sete; scape of the 
antenne scarcely flattened beneath. D. spinosus, D. texanus. 
2. Canidia (Thomson). Elytra with few and scattered incumbent sete, or naked; 
scape of the antenne broadly flattened or even grooved beneath. D. mexicanus, 
D. spinicornis, D. balteatus, and C. cincticornis, Thoms. (allied to D. balteatus). 
OXATHRES (p. 174). 
This genus must be withdrawn from our fauna, our species O. pictulus, on further 
examination, proving to have a different form of ovipositor in the female from that 
which is characteristic of Oxathres, in which the dorsal plate of this organ tapers to a 
sharp point, and is in the typical species carinated down the middle. In O. pictulus, 
though the bispinose ventral plate resembles that of Oxathres, the dorsal plate is broad 
and obtuse at the apex. The species must be placed in Vyssodrys, near WN. calligramma. 
SPHENOPSILUS. 
Gen. Oxathri affinis. Corpus scaphiforme absque setis. Caput parvum, angustum ; oculi subtiliter granulati, 
lobo inferiori subtriangulari, elongato. Antenne corpore vix longiores, tenues, articulis 1°-4™ subtus 
ciliatis, scapo valde elongato, gracili, apice clavato. Thorax graciliter trapezoideus, inermis, post medium 
vix rotundato-dilatatus. Elytra postice curvatim attenuata, apice sinuato-truncata, angulis externis valde 
productis. Prosternum et mesosternum angusta, illo valde arcuato hoc alte tuberculato. Pedes validi; 
femora gradatim incrassata; tarsi articulo 1° quam 2" et 3" conjuncti haud longiori. 
o. Segmentum apicale dorsale apice arcuatim emarginatum, ventrale latius, angulis acute productis. 
%. Segmentum apicale mediocriter elongatum ; dorsale late lanceolatum dorso subcarinato apice in denticulum 
prolongato ; ventrale semitubulare apice sinuatum, angulis productis acutis. 
The species for which this genus is rendered necessary has little resemblance to any 
other member of the “ Acanthocinini” group. The body is much narrowed anteriorly, 
including the head, and rather more gradually posteriorly; the antennal scape is long 
and slender, and clavate at the tip. The apical abdominal segment in both sexes is 
constructed nearly as in Oxathres, but the dorsal plate in the female is shorter and 
broader. 
1. Sphenopsilus claviger. (Tab. XXV. fig. 1.) 
Fulvescenti- vel ochraceo-fuscus, undique sat confertim atro-fusco irroratus elytrisque post medium fascia 
angusta valde undulata (suturam haud attingente) atro-fusca; thorace sparsim punctulato; elytris obsolete 
costulatis; antennis nigris, scapo medio articulisque 3°—6™ (apicibus exceptis) rufo-testaceis. 
Long. 33-6 lin. 
Hab. Panama, Bugaba (Champion). 
Several examples, captured in the forest region of the “ tierra caliente.” 
PROBATIUS (p. 175). 
Probatius mexicanus (p. 175). 
To the localities given, add :—Mexico, Oaxaca, Cerro de Plumas (Hége); Panama, 
Volcan de Chiriqui, Bugaba (Champion). 
BIOL. CENTR.-AMER., Coleopt., Vol. V., October 1885. 3g 
